//flex布局复用
@mixin flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

@mixin bgImg($w:0, $h:0, $imgsrc:'', $size:contain) {
    display: inline-block;
    width: $w;
    height: $h;
    background: url($imgsrc);
    background-size: $size;
}
